Paper carriage for adding machines



Feb. 12, 1924;

C.E.BROMAN PAPER CARRIAGE FOR ADDING MACHINES -Filed March 5 naneCHARLES E. BROMAN, 0F GRAND RAPIDS, MICHIGAN, ASSIGNOB, BY MESNE ASSIGN-MENT S, TO ADD-INDEX CORPORATION, A CORPORATION OF DELAWARE.

PAPER CARRIAGE FOR- ADDING- MACHINES.

Application filed. March 5, 1921. Serial no. 44 95995.

To all whom it may concern:

Be it known that I, CHARLES E. BRoMAN, a citizen of the United States,residing in Grand Rapids, in the county of Kent and State of Michigan,have invented a new and useful Improvement in Paper Carriages for AddingMachines, of which the following is a specification.

My invention relates to adding machine carriages, with a view to improvethe construction and operation of the same, while the manufacture isthereby simplified and made more economical.

In order to make the invention more clearly understood, I have shown inthe accompanying drawings means for carrying the invention intopractical effect, Without limiting the improvements in their usefulapplications to the particular construction which, for the sake ofexample, I have delineated. In said drawings- Figure 1 is an end view ofthe carriage and track removed from the machine frame.

Fi 2 is a plan'view of the fixed track on whic the carriage is to bemounted, showcarriage-actuating spring.

ini the I 1g. 3 1s a vertical cross section on line IHHI of Figure 2.

Fig. 4: is a similar view on line IVIV of Figure 5, showing the part ofthe machine frame to which the track is to be attaehed, so as to beremovable for adiustment and repair, but so as to be fixed during theuse of the machine.

Fig. 5 is a plan View of said frame part.

Fig. 6 is a bottom plan view of a portion of the track.

'Fi 7 is an enlarged side view of the ad justa 1e pulley journal.

Fig. 8 is a bottom plan View of said journal.

The illustrated embodiment of my improvements is designed for addingmachines, in which the printing type operate in a horizontal rearwarddirection, and the carriage for the paper whereon the printing is to beperformed traverses in horizontal transverse directions, so that thepaper is presented to the rear vertical type faces; the said movement ofthe carriage being ordinarily for the purpose of tabulating numbers incolumns and (or) adding together the variousnumbers in a line with aprinting of the total in the last column. For the purpose of clearlyunderstanding my improvements, it is not necessary to show the addingmachine or the tabulating devices by which the carriage is caused tomake relatively wide step by step movements, from column to column,during the printing of several numbers in the same line; and theillustration is mainly confined 3) whereupon the track is slidhorizontally to the lef (downward in Figure 5) to bring the pins 10 intothe narrow parts of the slots 9 with their heads tightly engaged underthe top plate 8.

A look is provided against the disengagement of the pins 10 from thenarrow parts of the slots, unless such disengagement be desired,consisting of a latch spring 12 secured at- 13 to the track and adaptedto snap into place with its edge opposed to a pin 14 attached to theframe plate 6 and passing up through a slot 15 in the track so that itmay oppose the latch spring 12.

lhe track 11 is preferably of sheet metal suitably formed at its frontand rear edges with anti-friction ball-retaining grooves 16 for therolling of balls 17 on which carriage 18 is supported. a

This carriage is preferably of sheet metal and has a bottom plate 19 andend plates 20, the paper roller 21 being journaled in the latter.

22 is a long and relatively fine steel helical spring (Figure 2) whichis attached at one end to a pin 23 fixed on the track 11, passes arounda grooved pulley 24 and has its other end attached to a pin 25 fixed onthe under side of the carriage. The journal 26 of the pulley is fixed tothe track 11, and the pulley is mounted there-on by means ofantifriction balls 27. The construction and arrangement are such thatthe spring is sensitive in operation, and has a long'contracting andexpanding movement, sufiicient for the desired movement of the carriage,such movement being distributed throughout the whole length of thespring. Also it results that the tension of the spring and its pull onthe carriage are more constant and do not vary so much as they would ifthe spring were not doubled.

Means for adjusting the tension of the spring are provided, comprising aflattened slidable member 28, and a screw 29, both formed on the journal26, and is a slot formed in the track in which the member fits so as tobe adjustable lon itudinally of the slot. 31 is a washer app ied on thescrew and 32 a motley which the journal 26 may be clamped. in place whenit has been adjusted to give the spring such force as will move thecarriage quickly from one tahulat ing stop to another without undue jarin sto ping:

t will be understood that my improvement does not exclude an arrangementin which the journal 26 of the pulley 24 is fixed to the carriage.

What I claim is 1. In a paper carriage construction for adding machines,the combination of a track, a carria 'e mounted and slidable thereon apulley having means whereby it is adjustably mounted on the track, andan extended and doubled helical spring passed around said pulley, andhaving one end attached to the track and the other end attached to thecarriage.

2. In a paper carriage construction for adding machines, the combinationof a track, a

naeaeeo carriage mounted to slide thereon, a pulley mounted on thetrack, and a longitudinally extensible elastic element passed around thepulley and having means at one end connecting said element with thetrack, and having means at the other end connecting said element withthe carriage.

3. in a paper carriage construction for adding machines the combinationof a track, a carriage mounted movably' on the track, a longitudinallyextensible elastic element doubled on itself and connected with thetrack and with the carriage, and a pulley holding the elastic element atits point of doubling.

4. In a paper carriage construction for adding machines, the combinationof a frame element having fixed interlocking means for the slidableinterlocking therewith of a carriage track, and a paper carriage mountedon said track and removable therewith as a unit and having interlockingmeans for engaging withthose of said frame element.

5. In a paper carriage construction for adding machines, the combinationof a fixed frame element," and a track and a paper carriage carriedthereby said track hem slidable into interlocking position on said fixedframe element, means on said frame element and track respectively forsaid interlocking, and a latch for holding said track from slidingrelative to the frame element.

C. E. BRQMANQ

